Jawabanmu

2014-05-16T16:21:35+07:00
7x + 60 + 5x = 180
12x + 60 = 180
12x = 120
x = 10
sudut 7x + 60 = 130
sudut 5x = 50
1 5 1
2014-05-16T16:24:20+07:00
Karena saling berpelurus, (7x+60) + 5x=180
                                          12x=120 <==> x= 10

7x + 60 =70 +60 = 130derajat

5x =50 derajat

okay (y) (y)
1 5 1